Quote:
Originally Posted by ember1205
Diameter is determined by the ratio of width (what you call out in your second post) to sidewall height. Going wider with the same ratio yields a taller diameter. Keeping the width the same while dropping the ratio yields a shorter height overall.
Is there not a width/ratio setup to achieve the diameter you want/need?
Also - most tire manufacturers will offer a Revolutions Per Mile rating which helps you ensure that your speedo and odo remain accurate.
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Well my car is a 2SS non 1LE. I'm assuming I don't have the wheel well clearance the ZL1 has. Which is why I was trying to stay with the 27.8 or smaller diameter.
I was just brain storming if I can do a 19" rear wheel with 325/30R20's keep my front 20" wheel with 285/30R20's. I wasn't sure if the front tire being slightly larger in diameter would affect things adversely.